Stuffing-box packing.



PATBNTED 00T. 23, 190e.

L .w..,l.h....w.w--h M. W/WNWHM. ................-----,--\\\\\\\\1 l M "UNITED sTATEs PATENT OFFICE SAMUEL M. Gr-USS,y OF READTNG, PENNSYLVANIA. STUFFING-Box PACKING..

Specification of Letters Patent.

Application fllei March 29, 1906. Serial No. 308.694.

To a/ZZ whom/t mag/concern:

Be it known that' I, SAMUELM. GUss, a` citizen of the United States, and a residenty of the city of Reading, rcounty of Berks, and State lof Pennsylvania, have invented certain new and useful Improvements in Stuffing-'Box Packing, of which the following is a specification.

My invention relates to an improved stuffingebox packing'intended for use infconnection withsteam-engines, hydraulic presses; or the like at any desired pressure andv adapted to serve effectively with a minimum ofl wear andgattention under conditions in which the axis of the reciprocating'rod may not be accurately maintained in a fixed line.

My improved packing comprises a split packing-ring fitted laterally to. an annular packing-ring chamber and provided with a circular groove in yits rod-contacting inner surface arranged in communication'with the chamber-space surrounding said ring and with the connected cylinder, whereby said ring is closed upon the reciprocating packed rod by the excess ofpressure exerted uponthe exterioriof said ring by the steamor other operating mediumiadmitted to the exterior portion of said chamber and to the communicating inner groove, the area vof which latter is so proportioned as to partiall vcoun,- terbalance the exterior pressure as esired. It .also comprises a spherical `packing-ring circularly chambered ,interiorly to receive the packing ring or rings and means for further securing positive lubrication 4by combining a suitablelubricating medium with the steam admittedto the packing.

The invention is fully described in connection with the accompanying drawings, illus-` trating a preferred embodiment thereof, and the nevel features are specifically pointed out` in the claims.

' Figure` 1 is a .longitudinal sectional view showing lmylimproved packing applied toa view` stufIing-box. Fig; 2 y1s;a cross-sectional taken on the line 22 of Fig. 1.y

Fitted to the stufling-box 2 and to the piston-rod or plunger3 is'` a spherical packing-- ring 4, having an interior ,circular groove vor recess 5, adapted to form an annular chamber around the rod 3 for the reception of split packing-rings .6, nicely itted therein so as to be tightly closed upon the plunger-rod,

as required. This spherical ring 4 is located between follower-rings 7'and 8, also fitted, exteriorly to the stuiing-box and bored to terposed spherical ring.

Patented Oct. 23, 1906.

, loosely encircle-the rod 3, said follower-rings being spherically cupped on their opposing faces, so as to receivev and bear upon the in- The inner ring 7 1s seated at the bottom of the stuffing-box, and

the outer ring 8 is suitably pressed inward by v a gland 9 to loosely clamp the spherical ring 4 between them. y

The ysplit lpacking-rings 6, as shown, are

formed'with exterior circumferential grooves 10 and also with similar interior grooves 11,

connected with said grooves 10 by communicatingl openings 12, and spring-bands 13,

located in the groove 10, as shown, serve tov loosely clamp the half-rings together upon,k v the rod 3. Opening into the packing-chamber v of the spherical ring and communcat- A i.

ing with the split-ring grooves and 1 1 is an inlet-passage 14, leading from an annular end chamber 15, formed between the spherical ring and the cupped follower-ring 7. n

From this annular chamber the restricted flow of steam entering the stufling-boxfrom the cylinder through the rear opening .of

the stuing-box and the loosely-fitted ring 7 is thus admitted into the end chamber, 15

and thence into the packing-chamber 5 and exerts itspressure upon the outer surface of Athe Vsplit packing-rings 6 to close the same tightly upon the rod 3, such closingpressure,

however, being reduced as may be desired f -by the opposite or opening pressure exerted,

upon the parted ring in the innercircular groove 11 thereof. This groove 11 thus serves not only to provide a counterbalanc'- llng-pressure area whereby any undue closing pressure of the packing-ring upon the'rod is i.

avoided, but also provides a cushioning and lubricating steam-chamber around therod,

wherebyfriction andwear are greatlyreduced,

and the counterbalarming-pressure area thus provided may not only be proportioned to the exterior pressure area, as desired, but is pref.

erably varied upon the upper and lower ringsections forming supplemental innerl grooves 1 l a upon the upper section,l as lindicated in the drawings, so as to secure a greater closing pressure upon the lower section tending to coun.- terbalance the weight of the rod, and 'thereby maintain the latter in true axial position. In connection with this provision for utilizing steam-pressure upon the split packing-rings I also provide for effectively furnishing'lubricating material to the parts, this being very simply and thoroughly laccomplished by providing an oil-inlet 16 through the in-A IOO lio

` parts.

ner follower-ring 7, arranged in communication with any suitable oil-cup, as indicated,

so that a required amount of lubricant may be automatically fed into the stuffing-box and p ositively combined and circulated with the steam into contact with the moving In order to more fully utilize this lubricant and more thoroughly pack the box, l fill the outer annular chamber 17 with an absorbent packing material 18 and preferably interpose a suitable washer 19 between the gland 9 and the outer followerring 8, as shown. The spherical packing-ring 4, thus loosely fitted to the stuffing-box and held thereon between the follower-rings 7 and 8, is adapted to adjust it'self freely in said box so as to always maintain its axis in accurate alinement with that of the reciprocating rod 3, while the split rings 6 at all times bear upon said rod, so as to insure a practically tight sliding fit with a minimum of pressure, such pressure being determined by the differential interior and exterior pressure areas of the rings, and

case the meeting faces of the half-ring parts of said spherical ring are tightly fitted together, so that said4 completed ring is in all cases essentially a single-piece ring formed with a packing-chamber of fixed size, to which the split rings 6 are accurately fitted laterally. The preferred construction specifically described and shown may of course be variously modified without departing from the invention.

What I claim is- 1. A stuffing-box packing comprising a spherical packing-ring having an integrallyformed annular packing-chamber, and split packing-rings fitted to said chamber.

2. A stuffing-box packing Ycomprising a spherical packing-ring having an integrallyformed annular packing-chamber, spherically-cupped follower-rings therefor, and split packing-rings fitted to said chamber.

8. A stuffing-box packing comprising a spherical packing-ring having an integrallyformed annular packing-chamber, with inletpassage thereto, and split packing-rings fitted to said chamber and provided with eircumferential grooves communicating with said inlet-passage.

4. A stuffing-box packing comprising a spherical packing-ring having an integrallyformed annular packing-chamber, spherically-cupped follower-rings forming annular end chambers between the same and the ends of said spherical ring, split packingrings fitted to said packing-chainbei' and provided with circumferential grooves, an oil-inlet to one of said end chambers and passage therefor to the packing-chamber.

5. A stuffing-box packing comprising a I spherical packing-ring having an integrallyformed annular packing-chamber, spherically-cupped follower-rings forming annular end chambers between the same and the ends of said spherical ring, split packingrings fitted to said packiiig-eliainber and provided with circumferential grooves, an oil-inlet to one of said end chambers and passage therefor to the packing-chamber, and an absorbent packing in the other end chainber.

6. A stuffing-box packing comprising a spherical packing-ring having an integrallyformed annular packing-chamber, spherically-cupped follower-rings therefor having the saine exterior diameter as said spherical ring and split packing-rings fitted to said chamber. 4

7. ln a stuffing-box packing arranged to form an annular packing-ring chanfber, a square-faced 4split packing-ring fitted laterally to said chamber and provided with a circular groove in its rod-contacting inner surface having an opening therefrom communicating with the chamber-space snrrounding said ring and with the connected cylinder, whereby said ring is closed upon the packed rod by the differential exterior pressure exerted thereon. by the operating medium admitted to said groove.

S. In a stuffing-box packing arranged to form an annular packing-ring chamber, a square-faced split packing-ring fitted laterally to said chamber and provided with a circular groove iii its rod-contacting inner surface having an opening therefrom communicating with the chamber-space surrounding said ring and with the connected cylinder, the groove area of the rod-supporting section of said split ring being less than that of the opposing ring-section, whereby said ring-sections ai'e closed upon the packed rod by diHierent differential exterior pressures exerted thereon by the operating medium admitted to said groove.

In testimony whereof I affix my signature in the presence of two witnesses.

SAML. M. GUSS.

Witnesses:

D. M. STEWART, W. G. STEWART. 

